Originally Posted by Ryano
I believe the sheet said that you needed reservations in advance no less than a month..
Actually its the other way around, you can't make reservations for more
than a month in advance:
If your itinerary includes a reserved site or any shelter, you must call the Backcountry Reservation Office at (865) 436-1231 to make reservations. The Backcountry Reservation Office is open from 8:00 a.m. until 6:00 p.m. daily. You may make reservations up to one month in advance of the first day of your trip.
I doubt that any/many of the reservation-only sites have filled up for next weekend. Give the number a call and see.
If you would prefer not to have reservations then campsite #30 may be the way to go. Its a first-come-first-to-camp campsite, that's about 2 miles past #24 (6.2 miles from the Elkmont TH)